The most interesting cars are the cars seized by police and used for parades, shows, and community relations with a "seized from a drug dealer" or something like that.
The coolest ones I think are the highway pursuit cars which at times are a little faster then the city patrol cars.
A few RCMP Jaguars, a donated Audi A-6 behind it. These were a while ago.
RCMP Volvo S70 T-5 in Quebec. Manitoba had some as well. I remember doing highway speeds when one blew past me at incredible speeds.
And of course, Aspen Colorado's famous Saab police cars originating when AWD or even FWD was not quite as common.